Is there a group of you who could train together, and invite (for pay) a sensei from a neighboring town to come teach you every so often? (Once a week, or once a month.) Or, same idea, but you all pile into a car and go train out of town every couple of weeks. It's far from ideal, but if you are advanced enough to help each other out, it might work. Dalen Johnson (here) has some experience in training at an outpost of a larger dojo. You might drop him a note.
Good luck!
Linda